To Be or Not to Be?

It seems as though my hair cannot make up its mind. I have found several white hairs and being the vain person I am, I always pluck them out. I have found several that are white at the tip, but are dark brown at the root. Today I even found one that starting from the root went brown-white-brown-white. Very interesting! Is it nutrition or hormones or just a bad hair day? I don't know and neither does my hair. To be or not to be? That is the question.